{"paper":{"title":"The DECam MAGIC Survey $-$ Mapping the Ancient Galaxy in CaHK: Overview and Summary of Early Science","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. B. Pace, A. Chiti, A. Drlica-Wagner, A. H. Riley, A. K. Vivas, A. M. Luna, A. P. Ji, A. R. Walker, A. Zenteno, B. Mutlu-Pakdil, C. E. Mart\\'inez-V\\'azquez, C. W. Skeffington, D. Crnojevi\\'c, D. Erkal, D. J. James, D. J. Sand, D. L. Nidever, D. S. Prabhu, E. Tollerud, F. O. Barbosa, G. E. Medina, G. Limberg, G. S. Stringfellow, H. Q. Do, J. A. Carballo-Bello, J. D. Sakowska, J. D. Simon, J. F. Wu, J. J. Hermes, J. L. Carlin, K. A. G. Olsen, K. R. Atzberger, K. Tavangar, L. Santana-Silva, M. Navabi, N. E. D. No\\\"el, N. Kallivayalil, P. Massana, P. S. Ferguson, S. N. Campana, T. S. Li, V. Chandra, V. M. Placco, W. Cerny, Y. Choi","submitted_at":"2026-05-26T05:51:53Z","abstract_excerpt":"We present the DECam Mapping the Ancient Galaxy in CaHK (MAGIC) survey, a 54-night NOIRLab Survey Program to image $\\gtrsim$5,000$\\,$deg$^2$ of the southern hemisphere using a metallicity-sensitive narrow-band filter covering the Ca$\\,$ii$\\,$H&K lines centered at 3955$\\,$A. This filter is installed on the Dark Energy Camera (DECam), mounted on the 4-m NSF V\\'{i}ctor M. Blanco Telescope. The survey reaches typical $10\\sigma$ depths of $\\text{mag}_{\\text{CaHK}} \\approx 22.5$, 3$-$4$\\,$mag deeper than comparable surveys in the southern hemisphere. By combining photometry from this Ca$\\,$ii$\\,$H&K"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.26581","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.26581/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}